Directions

Toss zucchinis and onions in a large bowl with olive oil until evenly coated. Spread vegetables into a large baking dish.

Roast vegetables in the preheated oven until golden, about 30 minutes. Season with salt and pepper. Reduce oven heat to 350 degrees F (175 degrees C).

Fill a large pot with lightly salted water and bring to a boil. Stir in penne and return to a boil. Cook pasta uncovered, stirring occasionally, until cooked through but still firm to the bite, about 11 minutes; drain.